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Windham Weaponry MCS Multi-Caliber Uppers

Kit MCS2Windham Weaponry announced new uppers that allow the shooter to quickly change calibers from 5.56 NATO to either 300 BLK or 7.62×39. The uppers are called MCS, or Multi-Caliber System. Currently, two are being produced: MCS1 and MCS2. The MCS1 has a complete 5.56 NATO upper assembly, and comes with a swappable barrel for the […]

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